Series
PFM Controlled, Step‐Up DC/DC Converters (Duty Ratio 58%)
NDuty
58%
NCMOS
Low Power Consumption
NOperating
Voltage
NOutput
Voltage Range
: 0.9V~10.0V
: 2.0V~7.0V
■Applications
GCellular
phones, pagers
GPalmtops
GCameras,
video recorders
GPortable
equipment
NOutput
Voltage Accuracy : ±2.5%
4
■General Description
The XC6381 series is a group of PFM controlled step-up DC/DC
converters.
The XC6381 series employs CMOS process and laser trimming
technologies so as to attain low power and high accuracy.
Max. oscillator frequency is trimmed to 155kHz (accuracy: ±15%).
Every built-in switching transistor type enables a step-up circuit to be
configured using only three external components ; a coil, a diode, and a
capacitor. External transistor versions are available to accommodate
high output current applications.
Both built-in and external transistor types include 5-pin and 3-pin
packages, which are provided with either a CE (chip enable) function that
reduces power consumption during shut-down mode, or a V
DD
pin
function (separated power and voltage detect pins).
SOT-23, SOT-25, and SOT-89-5 super mini-mold packages.
■Features
Operating (start-up) voltage range
: 0.9V~10V
Output voltage range
: 2.0V~7.0V in 0.1V increments
Highly accurate
: Set-up voltage ±2.5%
Maximum oscillator frequency
: 155kHz (±15%)
Duty Ratio
: 58% (±5%)
Both built-in switching transistor and external types are
available
Five-lead packaged units offer either Chip Enable or
independent V
OUT
pin option.
Small package
: SOT-23, 25 mini-mold (3-pin, 5-pin)
SOT-89, 89-5 mini-power mold
(3-pin, 5-pin)
■Typical Application Circuit
L
2
1
■Typical Performance
Characteristic
XC6381A301
L=100μH,C=47μF（Tantalum）
V
IN
C
IN
SOT-23
(TOP VIEW)
100
Efficiency:EFFI（％）
3
V
OUT
SD
C
L
（Tantalum）
80
V
IN
=2.0V
60
40
20
0
0.9V
1.2V
1.5V
1.8V
GND
0
20
40
60
80
100
Output Current:I
OUT
（mA）
475
TOREX [ TOREX SEMICONDUCTOR ]
